A Medical Researcher Is Interested in How Weight Gain in Children

question 14

Multiple Choice

A medical researcher is interested in how weight gain in children from third-world countries is affected by the source of protein (fish,roots and tubers,or nuts and oilseeds) and by level of protein intake (low,defined as less than 0.56 grams per kilogram of weight,or high) .The researcher wants to test the relative efficacy of each protein source,controlling for the level of protein intake but not testing it as the main variable of interest.For this purpose,she classifies a group of children in an impoverished village in a third-world country into either high or low protein intake.Then,the researcher randomly assigns 50 children from each category to a group where the children will receive food once a day that will emphasize one of the three protein sources.You can assume that the total level of protein intake is not affected (it's effects take a longer time to show and depend largely on the other meals the children have at home) .The researcher's alternative hypothesis is ______.

• A)\(\mu\)₁\(\neq\)\(\mu\)₂ \(\neq\)\(\mu\)₃
• B) \(\mu\)₁ \(\ge\)\(\mu\)₂ \(\ge\) \(\mu\)₃
• C) \(\mu\)₁ = \(\mu\)₂ = \(\mu\)₃
• D) at least one of the average weight gains will be different than the others
• E) \(\mu\)₁ \(\le\)\(\mu\)₂ \(\ge\) \(\mu\)₃

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Definitions:

Imposter Phenomenon

A psychological pattern in which an individual doubts their accomplishments and has a persistent internalized fear of being exposed as a "fraud."

Equity

When people receive rewards in proportion to the contributions they make toward the attainment of group goals.

Generalized Exchange

A type of social interchange where goods or services are provided to one member of a group without the expectation of a direct reciprocal action from the receiver.

Reciprocal

Pertaining to a mutual exchange or relationship in which both parties give and receive something of value.